Pushbutton switch



FIG. 1 is a top plan view of a pushbutton switch showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right end view thereof;

FIG. 4 is a left end view thereof;

FIG. 5 is a top elevational view thereof;

FIG. 6 is a bottom elevational view thereof, and

FIG. 7 is a perspective view thereof.

The ornamental design for a pushbutton switch, as shown and described.